Heckler & Koch MP5 vs M3 Grease Gun

1966–Present

1942–1945

~2,000,000 estimated

Over 680,000

680 mm (26.8 in) stock extended, 550 mm (21.7 in) stock retracted (MP5A3); Varies significantly depending on variant.

757mm (29.8 in) stock extended / 579mm (22.8 in) stock folded

115 mm (4.5 in) standard, various lengths depending on variant (e.g., MP5K: 102 mm (4.0 in), MP5SD: 146 mm (5.7 in))

203mm (8.0 in)

2.54 kg (5.6 lb) empty (MP5A3)

3,700g (8.15 lb) empty

15, 30 rounds standard; 10, 20, and 40 round options available

30 rounds

Roller-delayed blowback, closed bolt

Blowback, open bolt

Single-stage military trigger; SEF (Safe, Semi-automatic, Full-automatic) or Navy trigger groups available with burst-fire options

Selective fire (semi/full auto)

Rotary drum rear, hooded front post

Fixed blade front, flip-up L-type rear (100 and 200 yards)